Lamp



FIG. 1 is an oblique view of the lamp;

FIG. 2 is a front view thereof, the rear, left side, and right side views being identical thereto;

FIG. 3 is a bottom view thereof; and,

FIG. 4 is a top view thereof.

The dashed line showing of structural lines is included for the purpose of illustrating non-claimed subject matter and forms no part of the claimed design. 

CLAIM The ornamental design for a lamp, as shown and described. 